1 Corinthians 15:33-34, 58

Do not be deceived: “Bad company corrupts good morals.” Be sober-minded [be sensible, wake up from your spiritual stupor] as you ought, and stop sinning; for some [of you] have no knowledge of God [you are disgracefully ignorant of Him, and ignore His truths]. I say this to your shame.

Therefore, my beloved brothers and sisters, be steadfast, immovable, always excelling in the work of the Lord [always doing your best and doing more than is needed], being continually aware that your labor [even to the point of exhaustion] in the Lord is not futile nor wasted [it is never without purpose].